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better error message when implicits fail due to missing type ascription #5798

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scabug opened this issue May 14, 2012 · 2 comments
Closed

better error message when implicits fail due to missing type ascription #5798

scabug opened this issue May 14, 2012 · 2 comments
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implicit infer minimized usability
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2.11.0

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@scabug
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scabug commented May 14, 2012 

abstract class Foo { implicit val xxx: Map[String,String] } 

object Error1 extends Foo { implicit val xxx = Map("x"->"x") }
object Error2 extends Foo { implicit val xxx = Map[String,String]("x"->"x") }
object Error3 extends Foo { override implicit val xxx = Map[String,String]("x"->"x") }
//error: value -> is not a member of String

object Ok1 extends Foo { implicit val xxx: Map[String,String] = Map("x"->"x") }
object Ok2 extends Foo { implicit val xxx = Map(("x","x")) }
@scabug
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scabug commented May 14, 2012

Imported From: https://issues.scala-lang.org/browse/SI-5798?orig=1
Reporter: @refried
Affected Versions: 2.9.1, 2.10.0-M3
See #5265

@scabug scabug added this to the Backlog milestone Apr 7, 2017
@som-snytt
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The example compiles since 2.11. The linked ticket is to warn in any case.

@scala scala deleted a comment from scabug Dec 17, 2019
@SethTisue SethTisue modified the milestones: Backlog, 2.11.0 Dec 17, 2019
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implicit infer minimized usability
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2.11.0
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@SethTisue @som-snytt @scabug